D'oh! *facepalm*
I missed the closing } for the two functions, it should be:
google.visualization.events.addListener(chart, 'rangechange', function () {
var start = chart.getVisibleChartRange().start;
var end = chart.getVisibleChartRange().end;
var fooBase = chart.getValue(chart.getFilteredRows(start)[0], 1);
var barBase = chart.getValue(chart.getFilteredRows(start)[0], 2);
var view = new google.visualization.DataView(data);
view.setColumns([0, {
type: 'number',
label: 'foo',
func: function (dataTable, rownum) {
return dataTable.getValue(rownum, 1) / fooBase;
}
}, {
type: 'number',
label: 'bar',
func: function (dataTable, rownum) {
return dataTable.getValue(rownum, 2) / barBase;
}
}]);
chart.draw(view, options);
});
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